Use SNAPSHOT sync mode for LocalSync

chrome/browser/sync_file_system/local/syncable_file_operation_runner_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 42 matching lines @@
         callback_count_(0),
         write_status_(base::PLATFORM_FILE_ERROR_FAILED),
         write_bytes_(0),
         write_complete_(false),
         url_request_context_(file_system_.file_system_context()),
         weak_factory_(this) {}
 
   virtual void SetUp() OVERRIDE {
     ASSERT_TRUE(dir_.CreateUniqueTempDir());
     file_system_.SetUp();
-    sync_context_ =
-        new LocalFileSyncContext(base::MessageLoopProxy::current().get(),
-                                 base::MessageLoopProxy::current().get());
+    sync_context_ = new LocalFileSyncContext(
+        dir_.path(),
+        base::MessageLoopProxy::current().get(),
+        base::MessageLoopProxy::current().get());
     ASSERT_EQ(
         SYNC_STATUS_OK,
         file_system_.MaybeInitializeFileSystemContext(sync_context_.get()));
 
     ASSERT_EQ(base::PLATFORM_FILE_OK, file_system_.OpenFileSystem());
     ASSERT_EQ(base::PLATFORM_FILE_OK,
               file_system_.CreateDirectory(URL(kParent)));
   }
 
   virtual void TearDown() OVERRIDE {
@@ skipping 311 matching lines @@
       file_system_.operation_runner()->Truncate(
           URL(kFile), 10,
           ExpectStatus(FROM_HERE, base::PLATFORM_FILE_OK));
   file_system_.operation_runner()->Cancel(
       id, ExpectStatus(FROM_HERE, base::PLATFORM_FILE_ERROR_INVALID_OPERATION));
   base::MessageLoop::current()->RunUntilIdle();
   EXPECT_EQ(2, callback_count_);
 }
 
 }  // namespace sync_file_system